I'm trying to identify any +/- anomalies in tank level on an hourly basis. For example, if the tank level typically increases 2 feet an hour, but then suddenly swings up to say +4 feet on any given hour, I'd like to have that unusual swing captured/archived. So for instance, I'd want "current value + 4ft" in said hour to be highlighted. Would a capsule be the best way to accomplish this? How?